Pengaruh Rasio Resirkulasi dan Konsentrasi COD Influen Terhadap Kinerja Reaktor Hibrid Aerobik

Arum A.S., Irene (2002) Pengaruh Rasio Resirkulasi dan Konsentrasi COD Influen Terhadap Kinerja Reaktor Hibrid Aerobik. Diploma thesis, Institut Teknologi Sepuluh November.

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Abstract

Pengolahan limbah yang mengandung zat organik biodegradable umumnya menggunakan proses pengolahan suspended growth atau attached growth. Masing-masing sistem memiliki kelebihan dan kelemahan. Kombinasi kedua proses pengolahan tersebut dalam satu reaktor mulai dikembangkan sebagai upaya untuk menggabungkan kelebihan dari kedua sistem pengolahan tersebut. Selanjutnya, karena dilakukan aerasi, sistem ini disebut sebagai reaktor hibrid aerobik. Penelitian dalam skala laboratorium dilakukan untuk mengkaji pengaruh variasi rasio resirkulasi dan konsentrasi COD influen terhadap kinerja reaktor tersebut.

Empat buah reaktor dioperasikan secara paralel, masing-masing dengan rasio resirkulasi 0%, 25%, 50%, dan 75%. Limbah simulasi dengan konsentrasi COD 200 mg/L, 400 mg/L, dan 600 mg/L digunakan sebagai influen reaktor.

Hasil penelitian menunjukkan adanya pengaruh rasio resirkulasi dan konsentrasi COD influen terhadap kinerja reaktor hibrid aerobik. Peningkatan rasio resirkulasi menyebabkan efisiensi penyisihan COD dan NH₃ meningkat. Di sisi lain, peningkatan konsentrasi COD influen menyebabkan efisiensi penyisihan COD dan NH₃ menurun. Berdasarkan COD dan BOD terlarut, dengan HRT 2 jam, diperoleh efisiensi penyisihan COD sebesar 60–78%, BOD sebesar 80–90%, dan NH₃ sebesar 30–55%. Walaupun terjadi penyisihan NH₃, tampaknya tidak teridentifikasi adanya proses nitrifikasi.
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Biodegradable organic wastewater is usually treated using either a suspended growth or an attached growth system. Each system has its own advantages and disadvantages. The two systems can be combined to integrate the advantages of both, resulting in a hybrid reactor. A laboratory-scale reactor study was conducted to examine the reactor performance under different recirculation ratios and COD feed concentrations.

Four reactors were constructed and operated in parallel with recirculation ratios of 0%, 25%, 50%, and 75%. Synthetic wastewater with COD feed concentrations of 200 mg/L, 400 mg/L, and 600 mg/L was used as the influent.

The reactor performance was affected by both the recirculation ratio and COD feed concentration. A higher recirculation ratio resulted in greater COD and ammonia removal. On the other hand, removal efficiency decreased as the COD feed concentration increased. Based on soluble COD and BOD concentrations, at a hydraulic retention time of two hours, COD, BOD, and ammonia removal efficiencies were 60–78%, 80–90%, and 30–55%, respectively. Although ammonia removal occurred, nitrification was not identified.

Item Type:	Thesis (Diploma)
Additional Information:	RT 628.3 Ire p
Uncontrolled Keywords:	suspended growth, attached growth, hibrid, resirkulasi, suspended growth, attached growth, hybrid, recirculation
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD646 Sewage--Purification
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25101-(S2) Master Thesis
Depositing User:	magang .
Date Deposited:	21 Sep 2026 07:32
Last Modified:	21 Sep 2026 07:32
URI:	http://repository.its.ac.id/id/eprint/144741

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